RU2330000C1 - Method of producing of decorative concrete products - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention refers to the sphere of production of decorative construction concrete products. Method of producing of decorative concrete products includes preparation, dosing of the binding material, water, fine and coarse aggregates, fastening of coarse aggregate with the formation of picture line, preparation of concrete mixture, filling a form with this mixture which is earlier filled with the fastened coarse aggregate, hardening of the concrete mixture and mechanical processing. Fastening of coarse aggregate is performed by putting it into the form without a bottom pressed into the filled with sand reservoir with formation of the picture line, removal of the form without a bottom by pouring the coarse aggregate with cement mortar with further hardening. During mechanical processing the specified products are sawed against the hardened coarse aggregate.

EFFECT: increase of strengthening of the aggregate fastening with the binding material and among itself.

1 ex, 3 dwg

Description

The invention relates to the production of decorative building concrete products.

Known methods for the manufacture of concrete products, including the preparation, dosing of binder, water, fine and coarse aggregate, preparation of the mixture, its laying, hardening, machining [1, 2]. According to the method [2], secondary concrete aggregate obtained as a result of utilization (crushing) of concrete of dismantled structures is used as aggregate, which is a grain of coarse and fine aggregate bonded with a binder. Known methods [1, 2] are characterized by a random arrangement of coarse aggregate in the concrete mixture, which reduces the consumer properties of concrete products.

A known method of manufacturing decorative concrete products, in which a coarse aggregate - decorative crushed stone with a size of 10-20 mm - is laid according to a given pattern, glued to paper, concrete mixture is fed, the product is molded and the surface is heat treated and mechanically cleaned to remove paper [3].

The objective of the invention is to improve the consumer properties of concrete products.

The technical result of solving the problem is achieved by the fact that by the method of manufacturing decorative concrete products, including the preparation, dosing of binder, water, fine and coarse aggregate, bonding grains of coarse aggregate with the formation of the contour of the drawing, preparation of concrete mix, its laying in the mold for products, which is pre-placed bonded coarse aggregate, hardening of concrete mixture, machining, bonding grains of coarse aggregate is carried out by laying them in a mold without bottom , Vtoplennuyu in sand filled container to form a circuit pattern, removing the form without a bottom, filling the grain coarse aggregate with cement mortar or cement paste, followed by solidification, and during machining of these products sawn fastened by coarse aggregate.

A method of manufacturing decorative concrete products is illustrated by drawings. Figure 1 shows the preparatory operation for fastening a large aggregate binders; figure 2 - finished product (plate) with large aggregate, forming a pattern; figure 3 shows the product (block) with large aggregate, forming the contours of numbers and letters.

The method is illustrated by an example.

In a container (box) 1, filled about 1/2 of its volume with sand 2 for construction work, they lay and embed a metal mold 3 of any configuration without a bottom. A large aggregate (colored gravel, crushed stone, crushed brick, etc.) 4 fractions of 20-120 mm is placed in the volume of the form. After laying the aggregate, the mold is removed. Stacked in the form of a figure (Fig. 1), the aggregate is poured with cement mortar (prepared from the calculation, wt.%: Sand for construction work 70-80; "gray" cement 20-30, with a water-cement ratio of 0.7-0.9) and leave to harden. The use of cement paste instead of cement mortar is the equivalent technical solution.

By preparing, dosing and mixing a binder, water, fine aggregate, a concrete mixture of the same composition is prepared that was used to fasten a large aggregate, but with a lower (0.4-0.6) water-cement ratio. As a binder, for example, the usual “gray” Portland cement is used.

The bonded coarse aggregate is removed from the container 1, cleaned of excess sand 2, placed in a mold to obtain two plates, fixed in a predetermined position (for example, in a plane passing through the center of the mold) and poured with concrete mixture. The mixture is compacted, incubated for 28 days, after which the resulting workpiece is sawn, for example, on slabs A so that the slice passes through a large aggregate. If necessary, the surface of the cut is ground, polished.

By the proposed method, it is possible to obtain blocks B with large aggregate forming contours, numbers and letters (Fig. 3), or the contours of other patterns (ornaments, geometric shapes, plants, etc.). When using color (pink, gray, yellow, white, red, etc.) large aggregate, color binder, you can get colorful decorative concrete products with enhanced consumer properties.

Information sources

1. Gershberg O.A. Technology of concrete and reinforced concrete products. - M.: Stroyizdat. 1965. - S. 77, 78, 136.

2. Kroychuk L.A. Use of aggregates from recycled concrete products. // Construction Materials. - No. 9, 2004. - P. 52-53.

3. USSR copyright certificate No. 240524 A, C04B 41/60, 1969.

Claims (1)

A method of manufacturing decorative concrete products, including preparation, dosing of a binder, water, fine and coarse aggregate, bonding of coarse aggregate grains to form a pattern, preparation of concrete mix, laying in a mold for products in which bonded coarse aggregate is previously placed, hardening of concrete mix , machining, characterized in that the bonding of the coarse aggregate grains is carried out by laying them in a mold without a bottom, embedded in a sand-filled container, with the formation the contour of the picture, removing the form without a bottom, pouring the grains of coarse aggregate with cement mortar or cement dough, followed by solidification, and during machining, these products are sawn into a bonded coarse aggregate.

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